KAM.covad wrote: > I have a standard FTP server (slimftp) installed with Apache2triad that works > great with all ftp clients we have tried. However, we > have some clients who are working on workstations that are locked down tight. > They have ports 80, 81 and 443 open so they can > access the internet and download some files by http. They are limited to the > size of an attachment for sending files to us. It > would take an "act of congress" to open a port and it is not going to happen. > They use 81 for ftp somehow. > > Has anyone accomplished a workaround? packet relay? I know there is a way to > do it. I have googled and cannot seem to find a way to > do it although there are a lot of hits with 'ftp behind firewall'.
You need to set up port forwarding (DNAT) on your end to listen for port 81 requests and send to the standard ftp port. How you do that depends on your firewall. If they already have port 81 allowed on their end, then no changes should need to happen on their end. However, ftp is kind of tricky. I don't remember the particulars, but there's the concept of passive and active connections. I believe that setting up active connections requires multiple firewall rules. Paul _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
